Skywalker
Thankfully I was past my killing you phase.
It's standard protocol, or at least it was when SHIELD had the Tesseract, so it doesn't surprise me that they've kept that. Lots of people come through from all different worlds with varying degrees of instability, so it's caution. We'd probably do the same if it was our world.
Considering it's Romanoff it wouldn't surprise me if she read all of the books. I would have, if our situations had been reversed. But we are friendly and she has learned some of it from me. However, with our galaxy and our lives being fictional, it's not as difficult to learn about it as you might think.
Sam Winchester, he's a good friend and he's also actually in New York right now, which I'm not. He's been holding onto my lightsaber for me since it came through the Tesseract a few weeks back. I haven't rushed to get back to pick it up because I've got your old one with me right now.